Improvement in furnace-grates



v H. W. GRANGER.

Furnace-Grates.

Patenfed Oct. 26,1875.

N-PETERS, FHOTO-LITHOGRAPHER, WISHINGTON, I). O.

UNITED STATES A PATENT OFEroE.

HARRY W. GRANGER, OF DETROIT, MICHIGAN.

IMPROVEMENT IN F U RNACE-GRATES.

Specification forming part of Letters Patent No. 169,259, dated October26, 1875 application filed June 29, 1875.

To all whom it may concern:

Be it known that 1, HARRY W. GRANGER, of Detroit, in the county of Wayneand State of Michigan, have invented an Improvement inFurnace-Grates,'of which the following is a specification:

The nature of my invention relates to an improvement in furnace-gratesof that class in which the grate-sections are hung upon trunnions andoscillated thereon when it is desired to free the fire-bed fromclinkers, ashes, and other refuse matter; and its object is to soconstruct, arrange, and combine the several grate-sections, as that theywill be oscillated in alternating inclination by a single lever insertedin an arm pendent from that section which is nearest to thefurnace-front, as more fully hereinafter set fort-h.

Figure 1 is a perspective viewof my improved grate. Fig. 2 is a sideelevation of the same with the side bar of the frame removed. Figs. 3,4, and 5 are, respectively, inverted perspective views of anintermediate gratesection, a carrier grate-section, and the frontcarrier grate-section.

In the drawing, A represents a cast-iron rectangular frame,longitudinally disposed in the furnace. The frame maybe cast in onepiece for the smaller examples; but it'is preferable to make the sidesand ends separate and bolt them together. The ends are cast withinwardly-projecting grate-fingers a. In the sides are formed depressionsb, at regular distances apart, to receive the trunnionsb at the ends ofthe grate-sections B B, transversely hung in the frame, and all of whichhave projecting fingers a interlocking with I each other and with thefingers a at theends of the frame. Every second or alternategratesection in the frame is a carrier-section, similar to that shown inFigs. 4 and 5 at B. The intermediate sections are shown at B, Fig. 3.Each section B is cast with a Wiper or carrier, 0, from which there ispendent an arm, d, having a wrist, d, at its lower end, all of whichwrists are connected by a rod, 0, secured by a key through a hole, 0, inthe extremity of each wrist. The front carrier-section, Fig. 5, is castwith a pendent arm, f, with a socket to receive the end of the lever D,which is vibrated in a vertical plane through the ash-pit opening, and,through the connecting-rod (J, oscillates all the sections B. Eachsect-ion B has cast on end a horizontal jack, 0, with 'a rounded pendentbearing at each end, which rests upon the carrier 0 of the adjacentsection B, which, when elevated, lifts that end of said jack, and thustilts the section B in the opposite direction to the inclination of saidsection B, thereby breaking up the clinkers and freeing the fire-bedfrom the refuse matter of combustion.

What I claim as my invention is- In a sectionaloscillating.furnace-grate, substantially as described, the carrying'andintermediate grate-sections, the latter provided A with thebearing-jacks, and the former with the carriers and arms, all of whichare connected by a single bar, substantially as shown, and for thepurpose set forth.

HARRY W. GRANGER.

Witnesses:

H. S. SPRAGUE, H. F. EBERTS.

